vertex and node in abaqus

Thanks for your reply.

The problem is that, for example node 4, a node in my model  :

*Node
      1,           0.,           0.,           2.
      2,  0.800000012,           0.,           2.
      3,           0., -0.800000012,           2.
      4,           0.,           0.,           4.
      5,  0.800000012,           0.,           4.
      6,           0., -0.800000012,           4.
      7,  0.800000012,           0.,           0.
      8,           0.,  0.800000012,           2.
      9,           0.,  0.800000012,           0.

as you can see, node 4 has coordinates of  0.,           0.,           4.

but also in the model, there is a vertex number 3, has the same coordinates!! which means that there is a vertex on the node 4.

Now I am writing a script which depends on the node numbers. But when I call the node 4, it becomes another one, because this node with these coordinates are already taken by the vertex!!!

Is there a command by which I can delete or hide the vertices when I call the nodes?!!

Thanks